Basic knowledge of bismuth oxide
The physical and chemical properties of bismuth oxide
Bismuth oxide, also known as bismuth trioxide, is a yellow powder, insoluble in water, but soluble in strong acid to form bismuth (III) salt, with the molecular formula Bi2O3. The pure product has α type, β type, and δ type. α type is yellow monoclinic crystal, relative density 8.9, melting point 825 ℃, soluble in acid, insoluble in water and alkali; β type is bright yellow to orange, tetragonal crystal system, relative density 8.55, melting point 860 ℃, soluble Acid, insoluble in water. It is easily reduced to metallic bismuth by hydrogen, hydrocarbons, etc.; δ-Bi2O3 is a special material with a cubic fluorite ore structure. 1/4 of the oxygen ion position in its crystal lattice is vacant, so it has a very high oxygen ion conductivity. The main application objects of bismuth oxide are electronic ceramic powder materials, electrolyte materials, photoelectric materials, high-temperature superconducting materials, and catalysts. As an important additive in electronic ceramic powder materials, bismuth oxide is generally required to have a purity of more than 99.15%. The main application objects are zinc oxide varistors, ceramic capacitors, and ferrite magnetic materials.
Application of bismuth oxide
Bismuth oxide can be used to prepare bismuth salts; used as electronic ceramic powder materials, electrolyte materials, photoelectric materials, high-temperature superconducting materials, and catalysts. As an important additive in electronic ceramic powder materials, bismuth oxide is generally required to be above 99.15% purity. The main application objects are zinc oxide varistors, ceramic capacitors, and ferrite magnetic materials; as well as glaze rubber compounding agents, medicines, Red glass compounding agents, etc.
Preparation method of bismuth oxide
To the bismuth nitrate solution (80-90°C), an aqueous sodium hydroxide solution containing no carbon dioxide was added dropwise and mixed. The solution remains alkaline during the precipitation process, and a white, volume-swelling bismuth oxide hydrate Bi(OH)3 precipitates. This solution is heated and stirred for a short time to be dehydrated into yellow bismuth trioxide. After washing with water decantation, filtering, and drying, the finished bismuth oxide product is obtained.
(aka. Tanki New Materials Co.Ltd.) is a trusted global chemical material supplier & manufacturer with over 12 years of experience in providing super high-quality chemicals and Nanomaterials. As a leading nanotechnology development and product name manufacturer, Tanki New Materials Co.Ltd dominates the market. Our professional work team provides perfect solutions to help improve the efficiency of various industries, create value,and easily cope with various challenges. If you are looking for bismuth oxide
, please feel free to contact us.